We all want to own headphones with the best sound quality imaginable, and now you can… for only $55,000.

In 1990, German company Sennheiser set out to make the best headphones in the world. The result was an audiophile’s dream–the legendary Orpheus HE90, which cost $16,000 a pair. Only 300 pairs currently exist today, and they typically fetch over $30,000 on eBay. 25 years later, Sennheiser has created a successor, and the new Orpheus is the most expensive pair of headphones in the world.

In development for over a decade, the new, hand-crafted headphones have been built using over 6,000 components, including gold-vaporized ceramic electrodes, platinum-vaporized diaphragms, and Italian Carrara marble. The headphones are electrostatic, meaning they work by a static electric charge on a thin film that sits between two metal plates. Audio signal voltages cause the film, which weighs less than the air around it, to move back and forth, producing sound. As a result of the film’s light weight, it doesn’t produce its own sounds, leading to incredible clarity.

“It is able to deceive our senses in a completely unique way, creating the perfect illusion of being directly immersed in the sound,” Daniel Sennheiser, Sennheiser CEO, said in a press release.

No, these are not exactly headphones to take outside to test your new iPhone 6.